Exhaust Treatment Device With Integral Mount

ABSTRACT

An exhaust treatment device includes an inlet tube having an end in communication with a cavity within a housing. An exhaust treatment component for treating engine exhaust is positioned within the housing. A metal mounting member includes a mounting provision. A retaining plate is engaged with the metal mounting member and fixed to the housing to retain the mounting member between the housing and the retaining plate.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation-in-part of U.S. patent applicationSer. No. 13/268,124 filed on Oct. 7, 2011. The entire disclosure of theabove application is incorporated herein by reference.

FIELD

The present disclosure relates to an exhaust treatment device forreducing undesirable emissions from an internal combustion engine and,in particular, to a robust, integrated mounting system for supportingthe exhaust treatment device on a vehicle.

BACKGROUND

This section provides background information related to the presentdisclosure which is not necessarily prior art.

Exhaust gas treatment devices such as catalytic converters, dieseloxidation catalysts, diesel particulate filters, and the like, may beemployed in various applications to treat exhaust gasses emitted frominternal combustion engines. Many of the exhaust gas treatment devicesinclude relatively heavy components such as a ceramic substrate or acatalyst bed for treating the exhaust. The system for coupling theexhaust treatment device to the vehicle must withstand a wide range ofexternal inputs such as when a vehicle wheel enters and exits a potholein the road.

Typical exhaust treatment devices are fixed to the vehicle underbody orframe with a number of welded brackets or straps. While thesearrangements may have sufficiently supported the exhaust treatmentdevice in the past, the cost and complexity of individually weldingsupport brackets to the exhaust treatment device is undesirable.Depending on the number of brackets used and their location, stressconcentrations may be introduced that may negatively affect the usefullife of the exhaust treatment device. In addition, the use of clamps mayintroduce additional challenges in mounting to assure the properorientation of the exhaust treatment device and the clamp in order toclear other vehicular components.

One known exhaust treatment device includes an inlet end formed as acasting that is subsequently coupled to a sheet metal housing. Thecasting includes a mounting provision for the exhaust treatment device.Unfortunately, as the entire inlet assembly is formed from a castcomponent, heat is transferred readily from the interior of the exhausttreatment device to an exterior surface of the cast inlet assembly. Mostend users and Original Equipment Manufacturers prefer an insulatedarrangement where the external temperature of the treatment deviceremains below a predetermined maximum temperature. Furthermore, thecasting is relatively large, heavy and costly. Accordingly, it may bebeneficial to provide an improved exhaust treatment device including acost effective integral mounting system having sufficient thermalshielding.

SUMMARY

This section provides a general summary of the disclosure, and is not acomprehensive disclosure of its full scope or all of its features.

An exhaust treatment device includes an inlet tube having an end incommunication with a cavity within a housing. An exhaust treatmentcomponent for treating engine exhaust is positioned within the housing.A metal mounting member includes a mounting provision. A retaining plateis engaged with the metal mounting member and fixed to the housing toretain the mounting member between the housing and the retaining plate.

An exhaust treatment device includes an insulation material positionedbetween an inner shell and an outer shell. An inlet tube has an end incommunication with a cavity defined by the inner shell. A substrate fortreating engine exhaust is positioned within the inner shell. A metalmounting ring is positioned between the inner and outer shells andincludes a mounting provision for receipt of a fastener.

An exhaust treatment device includes an inner shell, an outer shell andan insulation material positioned therebetween. An inlet tube includesan end in communication with a cavity defined by the inner shell. Asubstrate for treating engine exhaust is positioned within the innershell. A metal mounting member includes a mounting provision. A coverplate engages the mounting member and is fixed to the outer shell toretain the mounting member between the outer shell and the cover plate.

Further areas of applicability will become apparent from the descriptionprovided herein. The description and specific examples in this summaryare intended for purposes of illustration only and are not intended tolimit the scope of the present disclosure.

DRAWINGS

The drawings described herein are for illustrative purposes only ofselected embodiments and not all possible implementations, and are notintended to limit the scope of the present disclosure.

FIG. 1 is a perspective view of an exemplary exhaust treatment devicewith an integral mount;

FIG. 2 is a cross-sectional view taken through the exhaust treatmentdevice depicted in FIG. 1;

FIG. 3 is a perspective view of a cast mounting ring;

FIG. 4 is a cross-sectional view taken through the cast mounting ringdepicted in FIG. 3;

FIG. 5 is a perspective view of an alternate exhaust treatment device;

FIG. 6 is a cross-sectional view taken through the exhaust treatmentdevice depicted in FIG. 5;

FIG. 7 is a cross-sectional view of an alternate exhaust treatmentdevice;

FIG. 8 is a partial end view of another alternate exhaust treatmentdevice;

FIG. 9 is a fragmentary cross-sectional of another exhaust treatmentdevice;

FIG. 10 is a fragmentary cross-sectional of another exhaust treatmentdevice;

FIG. 11 is a fragmentary cross-sectional of another exhaust treatmentdevice; and

FIG. 12 is a fragmentary cross-sectional of the exhaust treatment devicedepicted in FIG. 11.

Corresponding reference numerals indicate corresponding parts throughoutthe several views of the drawings.

DETAILED DESCRIPTION

Example embodiments will now be described more fully with reference tothe accompanying drawings.

FIGS. 1-4 depict an exemplary exhaust treatment device identified atreference numeral 10. Exhaust treatment device 10 includes a firstsubstrate 12 positioned upstream of a second substrate 14 within ahousing 15. First substrate 12 may be a diesel oxidation catalyst or aselective catalytic reduction device, while second substrate 14 may be adiesel particulate filter or a slip catalyst. Other exhaust treatmentelements may be used in lieu of first substrate 12 and second substrate14. Furthermore, the present disclosure relates to an exhaust treatmentdevice that includes one or more substrates within housing 15. The twosubstrate arrangements depicted in the Figures is merely forillustration purposes.

Housing 15 includes an inner shell 16 and an outer shell 17 surroundinginner shell 16. Inner shell 16 includes several metal stampings coupledto one another. For example, inner shell 16 includes an inner tube 18 inreceipt of first substrate 12 and second substrate 14. The substrates12, 14 are retained within inner tube 18 using a stuffing or sizingprocess for compressing a first mat 28 between first substrate 12 andinner tube 18, as well as compressing a second mat 30 between secondsubstrate 14 and inner tube 18. Outer shell 17 also includes severalinterconnected stampings such as an outer tube 34 circumscribing innertube 18. An insulation material 36 surrounds inner tube 18 and ispositioned between outer tube 34 and inner tube 18.

An inlet assembly 37 is fixed to outer tube 34 and inner tube 18. Inletassembly 37 includes a ring cover plate 38 having a flange 40 fixed to afirst end cap 44. An inner inlet 41 includes a lip 43 fixed to innertube 18. Inner inlet 41 forms a portion of inner shell 16 while end cap44 forms a portion of outer shell 17.

A mounting ring 54 is positioned between first end cap 44 and ring coverplate 38. Mounting ring 54 may be cast from a ductile iron having a highcontent of silicon and molybdenum as a one-piece monolithic component.This material provides excellent structural physical properties and maywithstand the high temperature environment of the exhaust treatmentdevice. The mounting ring may alternatively be formed using processessuch as forging, stamping, or machining. Metallic materials other thanthose listed are also contemplated.

Mounting ring 54 includes a generally cup-shaped hollow cross sectiondefined by an inner wall 60 and an outer wall 62 interconnected by anend wall 64. A plurality of solid mounting bosses 66 arecircumferentially spaced apart from one another. Each boss 66 includes athreaded aperture 68 for receipt of a fastener (not shown) to mountexhaust treatment device 10 to the vehicle. To define a robuststructural mount for exhaust treatment device 10, an inner surface 70 offirst end cap 44 is shaped as a pocket complementing an external surface72 of mounting ring 54. A plurality of apertures 76 extend through firstend cap 44 in alignment with threaded apertures 68. It should beappreciated that mounting ring 54 need not include the cup-shapedportions and may be shaped to have a more consistent solidcross-section.

To assemble exhaust treatment device 10, mounting ring 54 is placed intoengagement with inner surface 70. Ring cover plate 38 is positioned toengage mounting ring 54. Flange 40 is welded to first end cap 44 toretain mounting ring 54 at a desired location and provide a structuralinterconnection between the casting and the remaining stamped steelcomponents. First end cap 44 is also welded to mounting ring 54. Aninsulation material 77 is trapped between ring cover plate 38 and innerinlet 41. In an alternate arrangement, mounting ring 54 may be welded toone or more of the metal components it contacts.

Ring cover plate 38 includes at least one boss 48 engaging a like bossor plurality of bosses 50 formed on inner inlet 41. First end cap 44also includes a boss or set of bosses 78 positioned in engagement withthe boss or bosses 48 of ring cover plate 38. Each set of bosses arewelded together to fix first end cap 44, ring cover plate 38 and innerinlet 41 to each other. Each weld joins three adjacent sheet steelportions. First end cap 44 includes a flange 46 that is fixed to outertube 34 after the completion of inlet assembly 37. A thermal shield 80may optionally be fixed to an exterior surface of first end cap 44 tocover bosses 78 because these areas are devoid of insulation 77.

An inlet pipe assembly 82 includes a pipe 84 fixed to a shield 86. Aninsulation material 88 is positioned between pipe 84 and shield 86. Pipe84 includes a first end 90 extending through both outer tube 34 andinner tube 18 in communication with a cavity 92 formed upstream of firstsubstrate 12. An inlet 94 is formed at the second opposite end of inletpipe assembly 82 for receipt of exhaust from the internal combustionengine.

A flow distribution plate 96 is fixed to inner inlet 41 at a positiondownstream from first end 90 of pipe 84. Flow distribution plate 96includes a plurality of spaced apart apertures 98 having different sizesto induce a substantially uniform exhaust gas flow through firstsubstrate 12.

An outlet assembly 100 may be constructed using some of the same or atleast very similar components used to manufacture inlet assembly 37. Forexample, outlet assembly 100 includes a second end cap 44 a, a ringcover plate 38 a, an insulation material 77 a, an inner outlet 41 a, apipe 84 a, a shield 86 a, insulation 88 a and an outlet 94 a. Otherfeatures of outlet assembly 100 are substantially similar to thefeatures of the components forming inlet assembly 37. As such, theseelements will be identified with a lower “a” suffix.

The interconnection of components to form outer assembly 100 issubstantially the same as inlet assembly 37 with the exception thatmounting ring 54 is not present within outlet assembly 100 depicted inthe Figures. It should be appreciated, however, that should mountingflexibility be required, outlet assembly 100 may include a mounting ringsubstantially similar to mounting ring 54. In yet another arrangement,inlet assembly 37 may be constructed without mounting ring 54 and outletassembly 100 may include a mounting ring sandwiched between second endcap 44 a and ring cover plate 38 a.

FIG. 5 depicts an alternate exhaust treatment device identified atreference numeral 110. Exhaust treatment device 110 is substantially thesame as exhaust treatment device 10 with the exception that outletassembly 100 has been replaced with an outlet assembly 114. Outletassembly 114 includes an inner cone 116 fixed to inner tube 18 and anouter cone 118 fixed to outer tube 34. An insulation material 120 ispositioned between inner cone 116 and outer cone 118. A tube 124 extendsthrough apertures formed in both outer cone 118 and inner cone 116 toplace a first end 126 of tube 124 in communication with a cavity 128.Tube 124 includes an outlet 130 to allow treated exhaust to escapeexhaust treatment device 110.

Exhaust treatment device 110 provides an alternate plumbing arrangementfrom device 10. Pipe 84 transversely intersects an axis aligned with adirection of exhaust flow through substrates 12, 14. Tube 124 providesan outlet coaxially aligned with this flow axis. This contrasts with theplumbing arrangement defined by exhaust treatment device 10 where boththe inlet 94 and the outlet 94 a extend at right angles to a directionof exhaust flow through substrates 12, 14. One skilled in the art willappreciate that other geometrical arrangements of the inlet, outlet andexhaust flow path are contemplated as being within the scope of thepresent disclosure.

FIG. 7 depicts an alternate exhaust treatment device identified atreference numeral 200. Exhaust treatment device 200 is substantially thesame as exhaust treatment device 110 with the exception that inletassembly 37 is replaced with an inlet assembly 202. Inlet assembly 202includes an inner inlet 204 fixed to inner tube 18 to form a portion ofinner shell 16. An end cap 206 is a cup-shaped stamping surroundinginner inlet 204 and includes an end 207 fixed to outer tube 34 to form aportion of outer shell 17. Insulation 208 is positioned between innerinlet 204 and end cap 206. A mounting member 210 is sandwiched betweenan inner surface 212 of end cap 206 and a retaining plate 214. Retainingplate 214 is fixed to end cap 206. An inlet pipe assembly 220 includes apipe 222 fixed to a shield 224. An insulation material 226 is positionedbetween pipe 222 and shield 224. Pipe 222 includes a first end 228extending through end cap 206, retaining plate 214, and inner inlet 204to be in communication with cavity 94 upstream of first substrate 12.Shield 224, retaining plate 214 and inner inlet 204 are fixed to pipe222. Pipe 222 extends through mounting member 210.

Another alternate exhaust treatment device is identified at referencenumeral 250 and depicted in FIG. 8. Exhaust treatment device 250 issubstantially similar to each of the embodiments previously describedwith at least one exception that the cross-sectional shape of the deviceis not necessarily a circle or some other regular polygon. Exhausttreatment device 250 also includes a first mounting member 252 spacedapart from a second mounting member 254 in lieu of the one-piecemounting member previously described. It should be appreciated that anynumber of spaced apart mounting members may be incorporated withoutdeparting from the scope of the present disclosure. The individualmounting members are contemplated as being coupled to the exhausttreatment device as previously described. For example, first mountingmember 252 and second mounting member 254 may be positioned within anend cap not depicted in FIG. 8. The mounting members 252, 254 may besubsequently trapped between a retaining plate and the end cap. It isalso within the scope of the present disclosure to use multiple spacedapart mounting members in the exhaust treatment devices subsequentlyintroduced in this document.

FIG. 9 depicts a portion of another alternate exhaust treatment deviceidentified at reference numeral 300. Exhaust treatment device 300 issubstantially similar to the exhaust treatment devices previouslydescribed with at least one exception that a retaining plate 302 and amounting member 316 may be fixed to a previously assembled exhausttreatment device. Retaining plate 302 may be fixed directly to a flange304 of an outer end plate 306 instead of being directly coupled to outertube 34. An inner end plate 308 may be fixed to inner tube 18. Inner endplate 308 may be shaped as shown in FIG. 9 or may be elongated andconically shaped as previously described and identified as an innerinlet or an inner outlet. An insulation material 310 is positionedbetween inner end plate 308 and outer end plate 306. In the arrangementshown in FIG. 9, flange 304 of outer end plate 306 is fixed to an outersurface 312 of outer tube 34. A portion of retaining plate 302 overlapsflange 304 and is fixed thereto.

Mounting member 316 is trapped between retaining plate 302 and outer endplate 306. It should be appreciated that in another configuration notshown in FIG. 9, flange 304 may engage an inner surface 318 of outertube 34 while retaining plate 302 directly engages outer surface 312 ofouter tube 34.

By arranging the components as depicted in FIG. 9, a simplified methodof manufacture may result. More particularly, insulation 310 may beaccurately compressed a desired amount by engaging outer end plate 306with inner end plate 308 prior to fixing flange 304 to outer tube 34.The assembly exhaust treatment device 300 may be substantially completebefore handling and coupling mounting member 316 to device 300. Device300 may be more economically constructed as each of the stampings arerelatively shallow when compared to the deep draw versions previouslydescribed.

Once inner end plate 308 and outer end plate 306 have been fixed toinner tube 18 and outer tube 34, mounting member 316 is positionedwithin a pocket formed in retaining plate 302. Retaining plate 302 ispositioned to overlap flange 304 and engage outer end plate 306 at ornear its center. At this location, each of the three stamped metalcomponents, retaining plate 302, outer end plate 306 and inner end plate308 may be simultaneously welded together. Mounting member 316 mayengage an outer surface 322 of outer end plate 306. An outer perimeterof retaining plate 302 may also be welded to flange 304.

FIG. 10 shows another alternate exhaust treatment device identified byreference numeral 350. Only a portion of the exhaust treatment device isshown in FIG. 10 to illustrate the differences from the previouslydescribed devices. Exhaust treatment device 350 includes an inner shell352 including an inner tube 354 and an inner end plate 356. An outershell 360 includes an outer tube 362 surrounding inner tube 354 and anouter end plate 364. An insulation 366 is positioned between inner tube354 and outer tube 362, as well as between inner end plate 356 and outerend plate 364.

A mounting member 368 is positioned between inner end plate 356 andouter end plate 364. In one arrangement, a pocket 370 is formed in outerend plate 364 for receipt of mounting member 368. As previouslydescribed, mounting member 368 may be constructed as a one-piecemonolithic member or, alternatively, may include more than one spacedapart mounting member. In the configuration depicted in FIG. 10, aninner surface 374 of mounting member 368 is positioned in engagementwith an outer surface 380 of insulation 366. It should be appreciatedthat insulation 366 is compressible and a biasing load made be appliedon mounting member 368 based on the position of outer end plate 364 andmounting member 368 prior to fixing outer end plate 364 to outer tube362. A stud 384 is fixed to mounting member 368 and extends through anaperture 386 of outer end plate 364. Stud 384 includes an externalthread useful for mounting exhaust treatment device 350 to a supportstructure. Externally threaded stud 384 is merely an example of amounting provision that can be provided by mounting member 368. It isalso contemplated that mounting member 368 may include an internallyextending blind threaded bore. Other mounting provisions includingdifferently shaped fasteners are contemplated as being within the scopeof the present disclosure. These fasteners may extend outwardly beyondan outer surface of outer end plate 364 or may be internally locatedwithin mounting member 368 and accessible via aperture 386. Thealternate mounting provisions may be part of any of the mounting membersor mounting rings described in this paper.

FIGS. 11 and 12 depict an exhaust treatment device 400 equipped with analternate or supplementary mount 402. Mount 402 includes a mountingmember 404 positioned in contact with an outer surface 406 of outer tube34. A retaining plate 410 includes an inner surface 412 shaped as apocket complementing an outer profile of mounting member 404. Retainingplate 410 is fixed to outer tube 34 at flanges 416, 418. Mounting member404 or retaining plate 410 need only extend along a portion of thecircumference of outer tube 34 as depicted in FIG. 12. To save cost andweight, mounting member 404 and retaining plate 410 circumferentiallyextend less than 180 degrees. An aperture 422 extends through retainingplate 410 to allow access to a threaded blind bore 424. Alternatively, astud or other fastener may be fixed to mounting member 404 and extendthrough aperture 422.

The foregoing description of the embodiments has been provided forpurposes of illustration and description. It is not intended to beexhaustive or to limit the disclosure. Individual elements or featuresof a particular embodiment are generally not limited to that particularembodiment, but, where applicable, are interchangeable and can be usedin a selected embodiment, even if not specifically shown or described.For example, the mounting member and retaining plate interactionspreviously described could be utilized on an exhaust treatment devicehaving a single wall in lieu of the inner and outer shell constructionpreviously described. Another set of exhaust treatment devices arecontemplated as having all of the features previously mentioned exceptthe mounting ring. These devices may be mounted using more traditionalmeans such as bands or straps. An economical advantage is providedthrough the use of common components. Other features may also be variedin many ways. Such variations are not to be regarded as a departure fromthe disclosure, and all such modifications are intended to be includedwithin the scope of the disclosure.

What is claimed is:
 1. An exhaust treatment device, comprising: ahousing; an inlet tube having an end in communication with a cavitywithin the housing; an exhaust treatment component for treating engineexhaust, the exhaust treatment component positioned within the housing;a metal mounting member including a mounting provision; and a retainingplate engaged with the mounting member and fixed to the housing toretain the mounting member between the housing and the retaining plate.2. The exhaust treatment device of claim 1, wherein the retaining plateand the mounting member are positioned within the housing, the housingincluding an aperture aligned with the mounting provision.
 3. Theexhaust treatment device of claim 2, wherein the mounting provisionincludes a stud fixed to the mounting member and extending through theaperture in the housing.
 4. The exhaust treatment device of claim 2,wherein the mounting provision includes a receptacle in the mountingmember, the aperture being aligned with the receptacle.
 5. The exhausttreatment device of claim 1, wherein the retaining plate and themounting member are positioned outside of the housing, the retainingplate including an aperture aligned with the mounting provision.
 6. Theexhaust treatment device of claim 5, wherein the mounting provisionincludes a stud fixed to the mounting member and extending through theaperture in the retaining plate.
 7. The exhaust treatment device ofclaim 5, wherein the mounting provision includes a receptacle in themounting member, the aperture being aligned with the receptacle.
 8. Theexhaust treatment device of claim 5, wherein the housing includes a tubeand an end plate closing one end of the tube, the mounting membercontacting the end plate and the retaining plate.
 9. The exhausttreatment device of claim 1, wherein the housing includes a curved outersurface, the mounting member including a mating surface shaped tocomplement the curved outer surface, the mating surface engaging thecurved outer surface, the retaining plate being fixed to the housing andcoupling the mounting member to the housing.
 10. The exhaust treatmentdevice of claim 9, wherein the retaining plate contacts the mountingmember.
 11. The exhaust treatment device of claim 9, wherein the curvedouter surface together with the retaining plate encapsulate the mountingmember.
 12. The exhaust treatment device of claim 9, wherein theretaining plate and the mounting member circumferentially extend aroundthe housing less than 180 degrees.
 13. The exhaust treatment device ofclaim 1, wherein the housing includes a sheet metal inner shell, a sheetmetal outer shell and an insulation therebetween.
 14. An exhausttreatment device, comprising: an inner shell; an outer shell; aninsulation material positioned between the inner shell and the outershell; an inlet tube having an end in communication with a cavitydefined by the inner shell; an exhaust treatment component for treatingengine exhaust positioned within the inner shell; a metal mountingmember including one of a receptacle and a stud; and a retaining plateengaging the mounting member and being fixed to the outer shell to trapthe mounting member between the outer shell and the retaining plate, theretaining plate including an aperture aligned with the receptacle or thestud.
 15. The exhaust treatment device of claim 14, wherein the innershell includes a metal inner tube and an inner end plate closing one endof the inner tube, the outer shell including a metal outer tubesurrounding the inner tube and an outer end plate closing one end of theouter tube, the mounting member contacting the outer end plate.
 16. Theexhaust treatment device of claim 15, wherein the insulation material ispositioned between the inner end plate and the outer end plate.
 17. Theexhaust treatment device of claim 16, wherein the retaining plate isfixed to the outer end plate.
 18. The exhaust treatment device of claim16, wherein the retaining plate is fixed to the outer tube.
 19. Theexhaust treatment device of claim 14, wherein the retaining plateincludes a substantially planar surface and a circumferentiallyextending flange, the planar surface and the flange contacting themounting member.
 20. The exhaust treatment device of claim 14, whereinthe retaining plate and the outer shell encompass the mounting member.21. The exhaust treatment device of claim 14, further including anothermetal mounting member spaced apart from the mounting member and trappedbetween the outer shell and the retaining plate.
 22. The exhausttreatment device of claim 14, wherein the mounting member includes anuninterrupted ring.
 23. The exhaust treatment device of claim 14,wherein the mounting member includes a “U” shape.
 24. The exhausttreatment device of claim 14, wherein the inner shell, the outer shell,and the retaining plate are fixed to each other at a common location.25. The exhaust treatment device of claim 14, wherein the metal mountingmember engages an outer surface of the outer shell.
 26. An exhausttreatment device, comprising: an inner shell; an outer shell; aninsulation material positioned between the inner shell and the outershell; a tube having an end in communication with a cavity defined bythe inner shell; an exhaust treatment component for treating engineexhaust positioned within the inner shell; a metal mounting memberincluding a mounting provision; and a retaining plate engaged with themounting member and fixed to the outer shell to retain the mountingmember between the outer shell and the retaining plate, wherein themetal mounting member at least partially surrounds the tube.
 27. Theexhaust treatment device of claim 26, wherein the mounting provisionincludes a stud fixed to the mounting member and extending through theretaining plate.
 28. The exhaust treatment device of claim 26, whereinthe mounting provision includes a threaded bore and the retaining plateincludes an aperture aligned with the threaded bore.
 29. The exhausttreatment device of claim 26, wherein the mounting member is shaped asan uninterrupted ring and the tube extends through the ring.
 30. Theexhaust treatment device of claim 26, wherein the insulation material issandwiched between the inner shell and the retaining plate.
 31. Theexhaust treatment device of claim 26, further including another metalmounting member spaced apart from the mounting member and trappedbetween the outer shell and the retaining plate.
 32. The exhausttreatment device of claim 26, wherein the inner shell, the outer shell,and the retaining plate are fixed to each other at a common location.33. An exhaust treatment device, comprising: an inner shell including ametal inner tube and an inner end plate closing one end of the innertube; an outer shell including a metal outer tube surrounding the innertube and an outer end plate closing one end of the outer tube; aninsulation material positioned between the inner shell and the outershell; a flow tube having an end in communication with a cavity definedby the inner shell; an exhaust treatment component for treating engineexhaust positioned within the inner shell; and a metal mounting memberincluding a mounting provision, the mounting member being positionedbetween the inner shell and the outer shell, and engaging the outershell and the insulation.
 34. The exhaust treatment device of claim 33,wherein the insulation material is compressed to bias the mountingmember into engagement with the outer shell.
 35. The exhaust treatmentdevice of claim 34, wherein a portion of the insulation is compressedbetween the mounting member and the inner end plate.
 36. The exhausttreatment device of claim 33, wherein the insulation is positionedbetween the inner tube and the outer tube.
 37. The exhaust treatmentdevice of claim 33, wherein the mounting provision includes a stud fixedto the mounting member and extending through an aperture in the outershell.